Follow these steps carefully to flash your chosen Custom ROM. Step 1: Download the Files

If your ROM requires separate Google apps, return to the menu. Select the GApps zip file and swipe to flash it immediately after the ROM. Step 6: Format Data and Reboot

He navigated the touch screen with shaky fingers. Wipe > Advanced Wipe. Check: Dalvik / ART Cache, System, Data, Cache. Swipe to Wipe.

There is no official LineageOS support for the Oppo A9. Unofficial builds were created by independent developers.

Eliminate background bloatware to speed up your device.